<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1,minimum-scale=1,user-scalable=0"> 
      <title>前后端交互</title>
      <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
        <script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.min.js"></script>
        <script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
  </head>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
</html>
